wch_exti.h

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/*
 * Copyright (c) 2025 Michael Hope <michaelh@juju.nz>
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_INTERRUPT_CONTROLLER_WCH_EXTI_H_
#define ZEPHYR_INCLUDE_DRIVERS_INTERRUPT_CONTROLLER_WCH_EXTI_H_
 
#include <stdint.h>
 
#include <zephyr/sys/util_macro.h>
 
/* Callback for EXTI interrupt. */
typedef void (*wch_exti_callback_handler_t)(uint8_t line, void *user);
 
enum wch_exti_trigger {
        /*
         * Note that this is a flag set and these values can be ORed to trigger on
         * both edges.
         */
 
        /* Trigger on rising edge */
        WCH_EXTI_TRIGGER_RISING_EDGE = BIT(0),
        /* Trigger on falling edge */
        WCH_EXTI_TRIGGER_FALLING_EDGE = BIT(1),
};
enum wch_exti_trigger {…};
 
/* Enable the EXTI interrupt for `line` */
void wch_exti_enable(uint8_t line);
 
/* Disable the EXTI interrupt for `line` */
void wch_exti_disable(uint8_t line);
 
/* Set the trigger mode for `line` */
void wch_exti_set_trigger(uint8_t line, enum wch_exti_trigger trigger);
 
/* Register a callback for `line` */
int wch_exti_configure(uint8_t line, wch_exti_callback_handler_t callback, void *user);
 
#endif /* ZEPHYR_INCLUDE_DRIVERS_INTERRUPT_CONTROLLER_WCH_EXTI_H_ */